Find N(A)for the Set A $A = \{ x \mid x$

Find n(A) for the set A.
- $A = \{ x \mid x$ is a month in the year $\}$

A) $n ( A ) = 52$
B) $n ( A ) = 1$
C) $n ( A ) = 24$
D) $n ( A ) = 12$